Containers at the Port of Oakland in Oakland, California, US, on Thursday, March 26, 2026. David Paul Morris | Bloomberg | Getty Images Months after the Supreme Court ruled some tariffs were unconstitutional , the first round of tariff refunds has begun flowing in. Oshkosh Corporation CFO Matt Field confirmed to CNBC that the company has started receiving tariff refunds as of Tuesday. "Following acceptance of our initial filing, we have begun receiving payments on our tariff refund claims, representing an initial portion of our total claims submitted," Field said. The company has not yet verified its total refund amount, Field added. Basic Fun, the company behind Care Bears and Tonka trucks, also told CNBC it began receiving tariff refunds on Tuesday. CEO Jay Foreman said the refunds so far have only represented 5% of the company's total claim on its early invoices. "We will utilize the refund dollars to help support our 2026 cash flow and invest in our team.…